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A fundamental problem to be resolved to achieve carrier grade functioning of an SDN network is the controller placement problem. The problem has been traditionally limited to optimally assigning switches to static physical controllers and placing those controllers over a network topology. However, virtualized controllers in place of physical ones could largely increase the dynamism in network control...
The paper investigates the balance between Quality of Service (QoS) and power consumption for a traffic queue. Automatic adaptation to the power of the packet processing engine is sought through a heuristics and an optimal control strategy. The study allows to track the behavior of the system over time, thus avoiding the optimization of the steady state behavior of the system, which is hardly applicable...
The uncertain nonlinear descriptor systems with multiple time delays in system state and control are studied. The systems not only contain uncertainties, but also experience uncertainties in the input channels. The condition for robust stabilizable independent of delay of this kind of systems is presented by using Lyapunov methods. Using solutions of Lyapunov and Riccati equations, a linear state...
Wired and wireless network delays highly degrade the control performance of hybrid networked control systems(HNCS). In order to effectively restrain impact of network delay for the HNCS, a novel approach is proposed that new Smith predictor combined with fuzzy radial basis function neural network (FRBFNN), and comes true delay compensations. Because new Smith predictor does not include network delay...
This paper proposes a neural network based traffic signal controller, which eliminates most of the problems associated with TRPS mode of the closed loop system. Instead of storing timing plans for different traffic scenarios, which requires clustering and threshold calculations, the proposed approach uses an ANN model that produces optimal plans based on optimized weights obtained through its learning...
The variable time delay and the packet loss degrade the performance of Internet based teleoperation system seriously, even make the system unstable. To overcome the trouble, an idea that using CARIMA model of the linearized slave robot to design a controller based on the Generalized Predictive Control (GPC) method is proposed in this paper. We place the GPC controller at the remote site. First of...
Remote control and monitoring are very necessary in decentralized manufacturing environments. This is evidenced by todaypsilas distributed shop floors where agility and responsiveness are required to maintain high productivity and flexibility. However, there exists a lack of an effective system architecture that integrates remote condition monitoring and control of automated equipment; that give much...
A problem of stabilization of cluster unit in wireless sensor and actor network is discussed in this paper. Through modeling WSAN (wireless sensor and actor network) as a new multiple input single output model, this problem is transferred to stabilization of multi-sensor and single controller system with long but bounded multiple random time-delay and packet-loss. Using theories of jump linear system,...
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